If someone has a drinking problem the playing field may not be as even as one might think. Especially in a society that explains away unaceptable behavior surrounding alcohol use. The writer has already set up an excuse for the teacher drinking.
Like I said before people don't like to be called out on their behavior...the consequenses might be more than she is bargaining for.
I think her strategy is a good one..she has asked for support and spoke her truth...good job. I hope it all works out for you.
Mary